The development build you are referring was not built from cvs code, more looks like a custom old 0.6.7 dev build. Why? Kernel is not from CVS, and the last change that greatly effected it was 23 month ago, very stupid, "renaming bin to programs", there is no path like /boot/system/programs/init in this release, it would fail booting if kernel was from cvs. If soundblaster works in this version this is probably a custom 0.6.6, oss port was updated but driver wasn't.